Switch equipped plug



May 30, 1933. BROWN 1,912,252

SWITCH EQUIPPED PLUG Filed May 25, 1932 2 Sheets-Sheet 1 z/ I I I I 3b- Inventor I J/zkfe Brawn /1 Home y May 30, 1933. M. BROIWN SWITCH EQUIPPED PLUG.

Filed May 25, 1932 2 Sheets-Sheet 2 Inventor M7119 Brawn 4 llome y scription and the accompanying illustrative rection fromleft to right with the wires Patented May 30, 1933 1 UNITED STATES PATENT? OFFICE 1mm Baowmor mama, rmmrssan v swrrcn nomran rnue This invention relates to electrical applisectional and elevational view taken apances and more specifically to switches and proximately 011 the plane of the curved line plugs, and has particular reference .to a 8--8 of Figure 6. double pronged type of plug such as is used Figure 9 is in m g a connection between a wall or the prongs. fioor outlet and an electrical appliance cur- Figure- 10 isan elevational view of the rent conducting cord, or cable; washer retaining ring.

v Otherwise stated, the novelty is primarily Attention is first directed to the cap or predicated upon a multiple prong wall and shell 11. This is made of insulation matefloor plug which has a switch built into it rial and formed to providea receptacle havwhereby to permit the current to be turned ing a knurled finger gripping rim 12 and a oif or on without detaching the plug, this centralized neck: 13 having a passage to acbeing regarded as a safetyand convemence commodate the cord or cable l4. Formed feature. ,eccentricallyof the neck is an opening 15 In developing the inventive conception, which may be designated as a sight. I I have discovered a simple and economical Looking at Figure 7, it will be observed arrangement of parts capable ofexpeditlous that the numeral 16 designates an arcuate assembly and repair and calculated to fuldepression which serves a purpose to be here fill the requirements of an accessory of inafter described. The numeral 17 desigclass in a highly practical and efiicient nates a'clearance recess, adjacent to which a perspective view of one of manner. Y isa cam-surface 18 The e licit details selected for accom- Removably snapped into the grooved ,in-- plishing e results desired will become more Mr periphery of the rim of the cap is a fiber readily apparent from the following deinsulation washer 19 having a central open ing 20 for passage of the terminal ends of drawmgs. the positive and negative wires 21 and 22 In the drawings, whereinlike numerals res ctively-. As seen in Figure 6, the outare employed to designate like parts er gee of this washer is provided withinthroughout the views: scriptions Off and On as indicated at 23' Figure 1 is an elevational view showing and24 respectively. Incidentally, these desthe improved switch plug attached to a wall ignations are visible irom the exterior or floor socket or outlet as the case may through the sight 15. v b is washer carries the companion prongs and'26 adapted to fit into the outlet box or socket in the wall or floor as the case 35 may be. As seen in Figure 5, the pron .25 is provided with a lateral extension 2 to ofisetthe binding screw' 28 to which one of the wires isconnected after being drawn through the opening 20. The other prong 26 as seen in Figure 8 has its lateral end fastened to the disc through the medium of a headed rivet 29, the outer head of which is Figure 2 is a similar view with the plug 25 removed.

V Figure '3 is a front elevational view.

Figure 4 is a detail assembled sectional view showing the construction and relationship of details.

Figure 5 is an inside elevational view, that, is, a view observing Figure 2 in a didetached.

Figure 6 is an elevational view of the formed with a shallow depression 30. Incicontact equipped side of the removable dentall ,this rivet 29 forms the fixed contact washer. i a with which an indentation 31 on the inter- Figure? is an inside elevational view of mediateportion of the relatively movable the cap or shell with the other parts. re spring contact 32is co-operable. moved. The f ree or flexible end. of this contact Figure 8 is an enlarged or esaiggerated .sprmg,1s provided with ahead 33) which I when the switch is off is seated in the clearance depression 17 to allow the contacts 30 and 31 to separate to. break the circuit. The

the slot 16 serves to limit the rotary motion.

of the cap so as to bring the Off and On designations 23 and 24 into registry with the sight opening 15 in the cap.

The numeral 37 in Figure 4 designates a closing disc co-operable with the spring snap ring 38 which is snapped into the rim of the-cap to hold the washer in assembled positions Therefore, in order to remove the washer to make repairs to the terminal or binding post, all'that is necessary is to first remove the parts 37 and 38, whereupon the screws 28 and are exposed for repair purposes.-

As before stated, when the cap is rotated to register the Off designation 23 with the sight opening15, the headed end 33 of the spring contact 32 is then seated in the clearance pocket 17. Upon turning the cap a short turn to register the On designation '24: with the sight 0 ening 15, it is obvious .that the head 33 rides out of the pocket and engages the camsurface 18 whereupon the spring contact moves the button 31 into contact with the rivets 30 to close the circuit.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary. While the preferred embodiment of the invention has been shown and described, it is to be undertsood that minor changes coming within the field of invention claimed may be'resorted to if desired.

I claim:

1. A switch-plug of the class described comprising a washer of insulation material provided with prongs adapted for reception in the wall socket, means on said washer for attachment of the current conductor wireends thereto, a cap mounted for limited rotation on said washer, 'and a circuit closing switch interposed between the washer and cap and controllable by the rotary motion of the cap, said cap being provided'with a sight opening, and the adjacent face of the washer being provided with designations adapted to register with said sight opening to show when the switch is Off and On 2. In a switch plug of the class described,

a washer having a central aperture, a pair of companion prongs for attachment to a wall socket, one of the prongs being provided with a binding post to permit one of the wire ends to be attached thereto, the remaining prong being attached to the washer through the medium of a rivet constituting a stationary contact, an additional binding post for connection of the remaining wireend,-a flexible contact spring electrically connected with the last-named binding post and having its intermediate portion co-operable with said contact, a cap mounted for limited rotary movement on said washer and having a central. passage for the current conductor, the free end of said spring contact being co-operable with the adjacent surface of the cap to close the circuit when the cap is in one position and to open the circuit when the cap is in another position.

3. In a switch plug of the class described,-

a washer having a central aperture, 3. pair of companion prongs for attachment to a wall socket, one of the prongs being provided with a binding post to permit one of the wire ends to be attached thereto, the remaining prong being attached to the Washer through the medium of a rivet constituting a stationary contact, an additional binding post for connection of the remaining wireend, a flexible contact spring electrically connected with the last-named binding post and having its intermediate portion co-operable with said contact, a cap mounted for limited rotary movement on said washer, and hav ing a central passage for the current conductor, the free end of said spring contact being co-operable with the adjacent surface of the cap to close the circuit when the ca is in one position and to open the circuit ,when the cap is in another position, said cap having a sight opening registrable selectively with designations on the adjacent face of the washer to indicate the switch positions.

4. As a new article of manufacture, a cap of insulation material adapted for use in connection with a switch plug of the .class described, said cap being formed with a recess, a centrally disposed neck for passage of the current conductor cable, being further formed with a sight opening, the bottom of the recessed portion of said cap being formed with an eccentric arcuate slot constituting stop means, and the marginal portion of said bottom being formed with a depression constituting a spring contact clearance pocket.

5. Asa new artlcle of manufacture, an

insert for use in connection with a receptacle cap of the class described, said insert comprising a centrallyapertured washer of insulation material formed on one side with off and on designations, a socket prong provided with a lateral extension, said lateral extension being provided with a binding screw for connection of one wire-end, a

complemental prong, a rivet for connecting said complemental-prong to the washer, said rivet constituting a stationary contact element, a bushing mounted in said washer and internally screw-threaded, a screw threaded through said bushing, the head of the screw co-operating with the bushing to provide attaching means for the remaining wire-end, the shank of the screw extending through and beyond the bushing to serve as a stop element.

6. A switch plug of the class described comprising a rotary cap member of insulation material having a central passage and neck for the electricity conductor, the external surface of the rim of said cap being knurled to provide a finger grip, said cap be ing further formed with a sight opening, and provided on its interior with an arcuate slot eccentric of the central opening, and a clearance depression and an adjacent cam surface, an insulation washer fitting into said cap and having designations for cooperation with said sight opening, and having a central opening in registry with said neck, a prong attached to said washer and provided with a fastening screw for connection of one of the wire ends of the conductor, a complemental prong attached to the washer through the medium of a rivet, said rivet constituting a contact element, a binding post attached to said washer, -a spring contact fastened at one end to said binding post, the intermediate portion thereof being adapted for co-operation with said contact rivet, the free end of said spring contact being seated in said clearance depression when the switch is off and engageable with the cam surface to press the contacts together when the switch is on.-

In testimony whereof I aflix my signature.

MIKE BROWN. 

